/*
 * Created on 2005-3-18
 * Last modified on 2006-5-2
 * Powered by YeQiangWei.com
 */
package com.yeqiangwei.tools;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

/**
 * JAVA文件操作
 * @author YeQiangWei by 我容易么我
 * Powered by YeQiangWei.com
 */@SuppressWarnings("unused")
public class FileOperate {
    private String message = "";
    public FileOperate(){
        
    }

    /**
     * 根据含URL的文件地址提取文件名，含扩展名。
     * @param fileNameAndUrl
     * @return
     */
    public static String getFileName(String fileNameAndUrl){
        if(fileNameAndUrl==null) return "";
        String str = "";
        int fileNameStart = fileNameAndUrl.lastIndexOf(File.separator)+1;
        if(fileNameStart==0) return "";
        str = fileNameAndUrl.substring(fileNameStart, fileNameAndUrl.length());
        str = str.trim();
        return str;
    }
    
    /**
     * 根据含路径的文件名提取文件扩展名
     * @param fileNameAndPath
     * @return
     */
    public static String getFileExt(String fileNameAndPath){
        if(fileNameAndPath==null) return "";
        //fileNameAndPath = TypeChange.nullOfString(fileNameAndPath);
        String fileext = "";
        int extStart = fileNameAndPath.lastIndexOf(".")+1;
        if(extStart==0){
            return "";  
        }
        fileext = fileNameAndPath.substring(extStart,fileNameAndPath.length());
        return fileext;
    }

    /**
     * 读取文本文件内容
     * @param filePathAndName 带有完整绝对路径的文件名
     * @param encoding 文本文件打开的编码方式
     * @return 返回文本文件的内容
     */
    public String readTxt(String filePathAndName,String encoding){
    	encoding = encoding.trim();
    	StringBuffer str = new StringBuffer("");
    	String st = "";
    	try{
	    	FileInputStream fs = new FileInputStream(filePathAndName);
	    	InputStreamReader isr;
	    	if(encoding.equals("")){
	    		isr = new InputStreamReader(fs);
	    	}else{
	    		isr = new InputStreamReader(fs,encoding);
	    	}
	    	BufferedReader br = new BufferedReader(isr);
	    	try{
	    		String data = "";
	    		while((data = br.readLine())!=null){
	    				str.append(data+"\n"); 
	    		}
	    	}catch(Exception e){
	    		str.append(e.toString());
	    	}finally{
                br.close();
	    	    isr.close();
                fs.close();
            }
	    	st = str.toString();
    	}catch(IOException es){
    		st = "";
    	}
    	return st;    	
    }

    /**
     * 新建目录
     * @param folderPath 目录
     * @return 返回目录创建后的路径
     */
    public String createFolder(String folderPath) {
        String txt = folderPath;
        try {
            java.io.File myFilePath = new java.io.File(txt);
            txt = folderPath;
            if(!myFilePath.exists()) {
                myFilePath.mkdir();
            }
        }
        catch (Exception e) {
            message = "创建目录操作出错";
        }
        return txt;
    }
    
    /**
     * 多级目录创建
     * @param folderPath 准备要在本级目录下创建新目录的目录路径 例如 c:\myf
     * @param paths 无限级目录参数，各级目录以单数线区分 例如 a|b|c
     * @return 返回创建文件后的路径 例如 c:\myf\a\b\c
     */
    public String createFolders(String folderPath, String paths){
    	String txts = folderPath;
        try{
            String txt;
            txts = folderPath;
            StringTokenizer st = new StringTokenizer(paths,"|");
            for(int i=0; st.hasMoreTokens(); i++){
	            txt = st.nextToken().trim();
	            if(i!=0&&txts.lastIndexOf(File.separator)!=-1){ 
	            	txts = createFolder(txts + File.separator + txt);   
	            }else{
	            	txts = createFolder(txts + txt);
	            }
            }
            txts+=File.separator;
       }catch(Exception e){
           message = "创建目录操作出错！";
       }
       return txts;
    }
    
    /**
     * 
     * 新建文件
     * @param filePathAndName 文本文件完整绝对路径及文件名
     * @param fileContent 文本文件内容
     * @author YeQiangWei Studio by 我容易么我
     */
    public void createFile(String filePathAndName, String fileContent)
    	throws Exception
    {
    	FileWriter resultFile = null;
    	PrintWriter myFile = null;
        try {
            String filePath = filePathAndName;
            filePath = filePath.toString();
            File myFilePath = new File(filePath);
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
            }
            resultFile = new FileWriter(myFilePath);
            myFile = new PrintWriter(resultFile);
            String strContent = fileContent;
            myFile.println(strContent);
        }
        catch (Exception e) {
            message = "创建文件操作出错";
            throw(e);
        }finally{
            try {
            	myFile.close();
				resultFile.close();
			} catch (IOException e) {
				throw(e);
			}
        }
    }
    
    /**
     * 
     * 有编码方式的文件创建
     * @param filePathAndName 文本文件完整绝对路径及文件名
     * @param fileContent 文本文件内容
     * @param encoding 编码方式 例如 GBK 或者 UTF-8
     * @throws Exception
     * @author YeQiangWei Studio by 我容易么我
     */
    public void createFile
    	(String filePathAndName, String fileContent, String encoding)
    throws Exception
    {
    	PrintWriter myFile = null;
        try {
        	String filePath = filePathAndName;
            filePath = filePath.toString();
            File myFilePath = new File(filePath);
        	myFile = new PrintWriter(myFilePath,encoding);
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
            }
            String strContent = fileContent;
            myFile.println(strContent);
        }catch(IOException e){
            message = "创建文件操作出错"+e.toString();
            throw(e);
        }finally{
        	try{
        		myFile.close();
        	}catch (Exception e2) {
				throw(e2);
        	}
        }
    } 


    /**
     * 删除文件
     * @param filePathAndName 文本文件完整绝对路径及文件名
     * @return Boolean 成功删除返回true遭遇异常返回false
     * @author YeQiangWei Studio by 我容易么我
     */
    public boolean delFile(String filePathAndName) {
    	boolean bea = false;
        try {
            String filePath = filePathAndName;
            File myDelFile = new File(filePath);
            if(myDelFile.exists()){
            	myDelFile.delete();
            	bea = true;
            }else{
            	bea = false;
            	message = (filePathAndName+"<br>删除文件操作出错");
            }
        }
        catch (Exception e) {
            message = e.toString();
        }
        return bea;
    }
    


    /**
     * 删除文件夹
     * @param folderPath 文件夹完整绝对路径
     * @return
     */
    public void delFolder(String folderPath) {
        try {
            delAllFile(folderPath); //删除完里面所有内容
            String filePath = folderPath;
            filePath = filePath.toString();
            java.io.File myFilePath = new java.io.File(filePath);
            myFilePath.delete(); //删除空文件夹
        }
        catch (Exception e) {
            message = ("删除文件夹操作出错");
        }
    }
    
    
    /**
     * 删除指定文件夹下所有文件
     * @param path 文件夹完整绝对路径
     * @return
     * @return
     */
    public boolean delAllFile(String path) {
    	boolean bea = false;
        File file = new File(path);
        if (!file.exists()) {
            return bea;
        }
        if (!file.isDirectory()) {
            return bea;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (path.endsWith(File.separator)) {
                temp = new File(path + tempList[i]);
            }else{
                temp = new File(path + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                delAllFile(path + File.separator + tempList[i]);//先删除文件夹里面的文件
                delFolder(path + File.separator + tempList[i]);//再删除空文件夹
                bea = true;
            }
        }
        return bea;
    }


    /**
     * 复制单个文件
     * @param oldPathFile 准备复制的文件源
     * @param newPathFile 拷贝到新绝对路径带文件名
     * @return
     */
    public boolean copyFile(String oldPathFile, String newPathFile) {
        boolean bea = false;
    	try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPathFile);
            if (oldfile.exists()) { //文件存在时
                InputStream inStream = new FileInputStream(oldPathFile); //读入原文件
                FileOutputStream fs = new FileOutputStream(newPathFile);
                byte[] buffer = new byte[1444];
                while((byteread = inStream.read(buffer)) != -1){
                    bytesum += byteread; //字节数 文件大小
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
                fs.close();
                bea = true;
            }   
        }catch (Exception e) {
            message = ("复制单个文件操作出错");
        }
        return bea;
    }
    

    /**
     * 复制整个文件夹的内容
     * @param oldPath 准备拷贝的目录
     * @param newPath 指定绝对路径的新目录
     * @author YeQiangWei Studio by 我容易么我
     */
    public void copyFolder(String oldPath, String newPath) {
        try {
            new File(newPath).mkdirs(); //如果文件夹不存在 则建立新文件夹
            File a=new File(oldPath);
            String[] file=a.list();
            File temp=null;
            for (int i = 0; i < file.length; i++) {
                if(oldPath.endsWith(File.separator)){
                    temp=new File(oldPath+file[i]);
                }else{
                    temp=new File(oldPath+File.separator+file[i]);
                }
                if(temp.isFile()){
                    FileInputStream input = new FileInputStream(temp);
                    FileOutputStream output = new FileOutputStream(newPath + File.separator +
                    (temp.getName()).toString());
                    byte[] b = new byte[1024 * 5];
                    int len;
                    while ((len = input.read(b)) != -1) {
                        output.write(b, 0, len);
                    }
                    output.flush();
                    output.close();
                    input.close();
                }
                if(temp.isDirectory()){//如果是子文件夹
                    copyFolder(oldPath+File.separator+file[i],newPath+File.separator+file[i]);
                }
            }
        }catch (Exception e) {
            message = "复制整个文件夹内容操作出错";
        }
    }


    /**
     * 移动文件
     * @param oldPath 文件所在的原始路径
     * @param newPath 文件将要移动到的目标路径
     * @author YeQiangWei Studio by 我容易么我
     */
    public boolean moveFile(String oldPath, String newPath) {
        boolean bea = copyFile(oldPath, newPath);
        delFile(oldPath);
        return  bea;
    }
    

    /**
     * 移动目录
     * @param oldPath 目录所在的原始路径
     * @param newPath 目录将要移动到的目标路径
     * @author YeQiangWei Studio by 我容易么我
     */
    public void moveFolder(String oldPath, String newPath) {
        copyFolder(oldPath, newPath);
        delFolder(oldPath);
    }
    
    
    public String getMessage(){
        return this.message;
    }
}
    
